US 11,867,107 B2
Internal combustion engine for a motor vehicle and motor vehicle
Heiko Beil, Stuttgart (DE); Rene Ernst, Leimersheim (DE); Siegfried Mueller, Ingersheim (DE); and Michael Heinrichsmeyer, Steinheim (DE)
Assigned to Mercedes-Benz Group AG, Stuttgart (DE)
Appl. No. 18/040,516
Filed by Mercedes-Benz Group AG, Stuttgart (DE)
PCT Filed Jul. 21, 2021, PCT No. PCT/EP2021/070312
§ 371(c)(1), (2) Date Feb. 3, 2023,
PCT Pub. No. WO2022/028885, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 10 2020 004 717.3 (DE), filed on Aug. 5, 2020.
Prior Publication US 2023/0287818 A1, Sep. 14, 2023
Int. Cl. F01N 3/20 (2006.01); F01N 3/32 (2006.01); F02M 26/04 (2016.01); F02B 37/10 (2006.01)
CPC F01N 3/2013 (2013.01) [F01N 3/2033 (2013.01); F01N 3/323 (2013.01); F02B 37/10 (2013.01); F02M 26/04 (2016.02); F01N 2240/14 (2013.01); F01N 2240/16 (2013.01); F01N 2430/10 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An internal combustion engine (10) for a motor vehicle, comprising:
a drive shaft via which the motor vehicle is drivable by the internal combustion engine (10);
an intake tract (12) through which air to be supplied to a combustion chamber (14) of the internal combustion engine (10) is flowable;
an exhaust gas tract (16) through which an exhaust gas from the combustion chamber (14) is flowable;
an exhaust gas aftertreatment device (20) disposed in the exhaust gas tract (16) for aftertreating the exhaust gas;
a heating element (18) disposed in the exhaust gas tract (16) upstream of the exhaust gas aftertreatment device (20) for heating a gas flowing through the exhaust gas tract (16);
an electrically assisted exhaust gas turbocharger (22) which has a compressor wheel disposed in the intake tract (12) as a first rotor (24) for compressing air flowing through the intake tract (12), a turbine wheel as a second rotor (26) which is disposed in the exhaust gas tract (16) and which is drivable by the exhaust gas, and an electric machine via which at least one of the first and second rotors (24, 26) is drivable in a heating operation for heating the exhaust gas aftertreatment device (20), wherein in the heating operation, during which combustion processes in the combustion chamber (14) do not take place and the drive shaft is at a standstill, air is conveyable as a heating medium by the at least one of the first and second rotors (24, 26) into the exhaust gas tract (16) and is warmable by the heating element (18) in the heating operation to heat the exhaust gas aftertreatment device (20);
a conduit element (28) which is fluidically connected to the exhaust gas tract (16) at a first connection point (30) disposed downstream of the exhaust gas aftertreatment device (20) and at a second connection point (32) disposed upstream of the heating element (18), wherein at least a portion of the heating medium is returnable from the first connection point (30) to the second connection point (32) and is introducible into the exhaust gas tract (16) at the second connection point (32); and
a valve train that has an intake valve assigned to the combustion chamber (14) and an exhaust valve assigned to the combustion chamber (14), wherein the intake valve and the exhaust valve are simultaneously open in the heating operation such that the heating medium is fed from the intake tract (12) through the combustion chamber (14) into the exhaust gas tract (16) in the heating operation.